/*
 * Licensed to Elasticsearch B.V. under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch B.V. licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

using System;
using System.Runtime.Serialization;

namespace Nest
{
	[ReadAs(typeof(FieldSecurity))]
	public interface IFieldSecurity
	{
		[DataMember(Name = "except")]
		Fields Except { get; set; }

		[DataMember(Name = "grant")]
		Fields Grant { get; set; }
	}

	public class FieldSecurity : IFieldSecurity
	{
		public Fields Except { get; set; }
		public Fields Grant { get; set; }
	}

	public class FieldSecurityDescriptor<T> : DescriptorBase<FieldSecurityDescriptor<T>, IFieldSecurity>, IFieldSecurity
		where T : class
	{
		Fields IFieldSecurity.Except { get; set; }
		Fields IFieldSecurity.Grant { get; set; }

		public FieldSecurityDescriptor<T> Grant(Func<FieldsDescriptor<T>, IPromise<Fields>> fields) =>
			Assign(fields, (a, v) => a.Grant = v?.Invoke(new FieldsDescriptor<T>())?.Value);

		public FieldSecurityDescriptor<T> Grant(Fields fields) => Assign(fields, (a, v) => a.Grant = v);

		public FieldSecurityDescriptor<T> Except(Func<FieldsDescriptor<T>, IPromise<Fields>> fields) =>
			Assign(fields, (a, v) => a.Except = v?.Invoke(new FieldsDescriptor<T>())?.Value);

		public FieldSecurityDescriptor<T> Except(Fields fields) => Assign(fields, (a, v) => a.Except = v);
	}
}
